ref: e55cb65c247a9cdfa0528d34dec70d435898d098
dir: /sys/src/cmd/scuzz/cdaudio.c/
#include <u.h> #include <libc.h> #include <bio.h> #include "scsireq.h" extern Biobuf bout; long SRcdpause(ScsiReq *rp, int resume) { uchar cmd[10]; memset(cmd, 0, sizeof(cmd)); cmd[0] = ScmdCDpause; cmd[8] = resume; rp->cmd.p = cmd; rp->cmd.count = sizeof(cmd); rp->data.p = cmd; rp->data.count = 0; rp->data.write = 1; return SRrequest(rp); } long SRcdstop(ScsiReq *rp) { uchar cmd[10]; memset(cmd, 0, sizeof(cmd)); cmd[0] = ScmdCDstop; rp->cmd.p = cmd; rp->cmd.count = sizeof(cmd); rp->data.p = cmd; rp->data.count = 0; rp->data.write = 1; return SRrequest(rp); } static long _SRcdplay(ScsiReq *rp, long lba, long length) { uchar cmd[12]; memset(cmd, 0, sizeof(cmd)); cmd[0] = ScmdCDplay; cmd[2] = lba>>24; cmd[3] = lba>>16; cmd[4] = lba>>8; cmd[5] = lba; cmd[6] = length>>24; cmd[7] = length>>16; cmd[8] = length>>8; cmd[9] = length; rp->cmd.p = cmd; rp->cmd.count = sizeof(cmd); rp->data.p = cmd; rp->data.count = 0; rp->data.write = 1; return SRrequest(rp); } static struct { int trackno; long lba; long length; } tracks[100]; static int ntracks; long SRcdplay(ScsiReq *rp, int raw, long start, long length) { uchar d[100*8+4], *p; int lba, n, tdl; if(raw || start == 0) return _SRcdplay(rp, start, length); ntracks = 0; if(SRTOC(rp, d, sizeof(d), 0, 0) == -1){ if(rp->status == STok) Bprint(&bout, "\t(probably empty)\n"); return -1; } tdl = (d[0]<<8)|d[1]; for(p = &d[4], n = tdl-2; n; n -= 8, p += 8){ tracks[ntracks].trackno = p[2]; lba = (p[4]<<24)|(p[5]<<16)|(p[6]<<8)|p[7]; tracks[ntracks].lba = lba; if(ntracks > 0) tracks[ntracks-1].length = lba-tracks[ntracks-1].lba; ntracks++; } if(ntracks > 0) tracks[ntracks-1].length = 0xFFFFFFFF; for(n = 0; n < ntracks; n++){ if(start != tracks[n].trackno) continue; return _SRcdplay(rp, tracks[n].lba, tracks[n].length); } return -1; } long SRcdload(ScsiReq *rp, int load, int slot) { uchar cmd[12]; memset(cmd, 0, sizeof(cmd)); cmd[0] = ScmdCDload; if(load) cmd[4] = 0x03; else cmd[4] = 0x02; cmd[8] = slot; rp->cmd.p = cmd; rp->cmd.count = sizeof(cmd); rp->data.p = cmd; rp->data.count = 0; rp->data.write = 1; return SRrequest(rp); } long SRcdstatus(ScsiReq *rp, uchar *list, int nbytes) { uchar cmd[12]; memset(cmd, 0, sizeof(cmd)); cmd[0] = ScmdCDstatus; cmd[8] = nbytes>>8; cmd[9] = nbytes; rp->cmd.p = cmd; rp->cmd.count = sizeof(cmd); rp->data.p = list; rp->data.count = nbytes; rp->data.write = 0; return SRrequest(rp); } long SRgetconf(ScsiReq *rp, uchar *list, int nbytes) { uchar cmd[10]; memset(cmd, 0, sizeof(cmd)); cmd[0] = Scmdgetconf; cmd[7] = nbytes>>8; cmd[8] = nbytes; rp->cmd.p = cmd; rp->cmd.count = sizeof(cmd); rp->data.p = list; rp->data.count = nbytes; rp->data.write = 0; return SRrequest(rp); }